/*
 * This file is part of Applied Energistics 2. Copyright (c) 2013 - 2014, AlgorithmX2, All rights reserved. Applied
 * Energistics 2 is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General
 * Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
 * later version. Applied Energistics 2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
 * Public License for more details. You should have received a copy of the GNU Lesser General Public License along with
 * Applied Energistics 2. If not, see <http://www.gnu.org/licenses/lgpl>.
 */

package appeng.transformer;

import net.minecraft.client.gui.FontRenderer;
import net.minecraft.client.gui.GuiErrorScreen;

import cpw.mods.fml.client.CustomModLoadingErrorDisplayException;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

@SideOnly(Side.CLIENT)
public final class MissingCoreMod extends CustomModLoadingErrorDisplayException {

    private static final int SHADOW_WHITE = 0xeeeeee;
    private static final int COLOR_WHITE = 0xffffff;
    private static final long serialVersionUID = -966774766922821652L;
    private static final int SCREEN_OFFSET = 15;

    private boolean deobf = false;

    @Override
    public void initGui(final GuiErrorScreen errorScreen, final FontRenderer fontRenderer) {
        final Class<?> clz = errorScreen.getClass();
        try {
            clz.getField("mc");
            this.deobf = true;
        } catch (final Throwable ignored) {

        }
    }

    @Override
    public void drawScreen(final GuiErrorScreen errorScreen, final FontRenderer fontRenderer, final int mouseRelX,
            final int mouseRelY, final float tickTime) {
        int offset = 10;
        this.drawCenteredString(
                fontRenderer,
                "Sorry, couldn't load AE2 properly.",
                errorScreen.width / 2,
                offset,
                COLOR_WHITE);

        offset += SCREEN_OFFSET;
        this.drawCenteredString(
                fontRenderer,
                "Please make sure that AE2 is installed into your mods folder.",
                errorScreen.width / 2,
                offset,
                SHADOW_WHITE);

        offset += 2 * SCREEN_OFFSET;

        if (this.deobf) {
            offset += SCREEN_OFFSET;
            this.drawCenteredString(
                    fontRenderer,
                    "In a developer environment add the following too your args,",
                    errorScreen.width / 2,
                    offset,
                    COLOR_WHITE);

            offset += SCREEN_OFFSET;
            this.drawCenteredString(
                    fontRenderer,
                    "-Dfml.coreMods.load=appeng.transformer.AppEngCore",
                    errorScreen.width / 2,
                    offset,
                    SHADOW_WHITE);
        } else {
            this.drawCenteredString(
                    fontRenderer,
                    "You're launcher may refer to this by different names,",
                    errorScreen.width / 2,
                    offset,
                    COLOR_WHITE);

            offset += SCREEN_OFFSET + 5;

            this.drawCenteredString(
                    fontRenderer,
                    "MultiMC calls this tab \"Loader Mods\"",
                    errorScreen.width / 2,
                    offset,
                    SHADOW_WHITE);

            offset += SCREEN_OFFSET;
            this.drawCenteredString(
                    fontRenderer,
                    "Magic Launcher calls this tab \"External Mods\"",
                    errorScreen.width / 2,
                    offset,
                    SHADOW_WHITE);

            offset += SCREEN_OFFSET;
            this.drawCenteredString(
                    fontRenderer,
                    "Most other launchers refer to this tab as just \"Mods\"",
                    errorScreen.width / 2,
                    offset,
                    SHADOW_WHITE);

            offset += 2 * SCREEN_OFFSET;
            this.drawCenteredString(
                    fontRenderer,
                    "Also make sure that the AE2 file is a .jar, and not a .zip",
                    errorScreen.width / 2,
                    offset,
                    COLOR_WHITE);
        }
    }

    private void drawCenteredString(final FontRenderer fontRenderer, final String string, final int x, final int y,
            final int colour) {
        final String reEncoded = string.replaceAll("\\P{InBasic_Latin}", "");
        final int reEncodedWidth = fontRenderer.getStringWidth(reEncoded);
        final int centeredX = x - reEncodedWidth / 2;

        fontRenderer.drawStringWithShadow(string, centeredX, y, colour);
    }
}
